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Working principle of bi-metallic thermometer Time :2009-07-2 Click: 7 |
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Bimetal thermometer is the working principle of the use of two different temperature expansion coefficient of metal, welding one end of a fixed point, the other end when the temperature changes in distorted its pointer into,instructions temperature. Refers to core-pulling type bi-metallic temperature components can be extracted outside the protection of pipe replacement, is the scene of the most widely used thermometer instructions.
Bi-metallic thermal resistance (even) the integration of the thermometer (transmitter) and the electrical contacts protective core-pulling type bi-metallic thermal resistance (even) the integration of the thermometer and transmitter, which is in the bi-metallic thermometer products based on sets of At the same time into the tube sheathed parallel thermal resistance (dual) of a meter. Can use this form to see the scene clearly indicated value, but also to signal to the control room Far. Control signal has reached the platinum resistance Pt100, K-type E-type thermocouple signal, but also through transmission for 4-20mA standard signal, played a dual role of a table. The use of this form may be less in the pipeline to open a hole, a small leak point (often a result of accidents in the Open Office), and its price than the price of the cheapest table 2. Therefore, this table practical value both as well as economic value. (Thermal resistance of platinum and non-armored type)
Bimetal thermometer is the use of two different metals in the temperature changes in the principle of expansion of different levels of work.
Industrial Bimetal thermometer is a major component of two or more metal sheets together to form the multi-storeysheet metal.
To enhance the temperature sensitivity, usually made of sheet metal roll spiral shape. When the temperature of multi-layer sheet metal changes, all levels of expansion or contraction of the volume of metal, ranging from making spiral curly or release.
As the spiral end of a fixed volume and the other end and a free rotation of the pointer-linked, so feel Bimetal temperature, the indicator can be in a circle on the graduated scale to indicate the temperature.
This instrument is the temperature range 200 ~ 650 ≧, are the benchmark to allow two-way error of 1%.
This rod-like glass thermometer and the use of the thermometer liquid, but can be used in the mechanical strength under demanding conditions.
WSS series bimetallic thermometer is a low-temperature measurement instrumentation at the scene. Bimetal thermometer can be directly measured in a variety of production processes -80 ≧ ~ +500 ≧ range of liquid, steam and gas temperature.
Main Features
1, the scene showed that temperature, intuitive convenience; safe and reliable, long service life;
2, a variety of structures to meet different requirements.
Working Principle
Bimetal thermometer is based on around the ring made of bent sheet metal-like composition of the double. Thermal expansion of one end, the driven pointer rotation, the work of the instrument will show the temperature value should be. |
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